package main;

/*
 * $Header: 
 * $Revision$
 * $Date$
 * ====================================================================
 *
 *  Copyright 2002-2004 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * [Additional notices, if required by prior licensing conditions]
 *
 */

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.util.List;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.InputStreamRequestEntity;
import org.apache.commons.httpclient.methods.PostMethod;

import xmlGenerator.RequestXMLGenerator;

/**
 * 
 * This is a sample application that demonstrates how to use the Jakarta
 * HttpClient API.
 * 
 * This application sends an XML document to a remote web server using HTTP POST
 * 
 * @author Sean C. Sullivan
 * @author Ortwin Glück
 * @author Oleg Kalnichevski
 */
public class PostXML {

	/**
	 * 
	 * Usage: java PostXML http://mywebserver:80/ c:\foo.xml
	 * 
	 * @param args
	 *            command line arguments Argument 0 is a URL to a web server
	 *            Argument 1 is a local filename
	 * 
	 */
	public String readAndPost(List<String> titles, Boolean cites,
			Boolean related) throws Exception {

		String response = "";

		// Get target URL
		String strURL = "https://ws.isiknowledge.com/cps/xrpc";

		RequestXMLGenerator xce = new RequestXMLGenerator(titles, cites,
				related);
		xce.generateXML();

		// Get file to be posted
		String strXMLFilename = "src/main/resources/xml/query.xml";
		File input = new File(strXMLFilename);

		// Prepare HTTP post
		PostMethod post = new PostMethod(strURL);

		// Request content will be retrieved directly
		// from the input stream
		// Per default, the request content needs to be buffered
		// in order to determine its length.
		// Request body buffering can be avoided when
		// content length is explicitly specified
		post.setRequestEntity(new InputStreamRequestEntity(new FileInputStream(
				input), input.length()));

		// Specify content type and encoding
		// If content encoding is not explicitly specified
		// ISO-8859-1 is assumed
		post.setRequestHeader("Content-type", "text/xml; charset=ISO-8859-1");

		// Get HTTP client
		HttpClient httpclient = new HttpClient();

		// Execute request
		try {

			int result = httpclient.executeMethod(post);

			// Display status code
			System.out.println("Response status code: " + result);

			// Display response
			//System.out.println("Response body: ");
			response = post.getResponseBodyAsString();
			writeToFile(response);
			//System.out.println(response);

		} catch (Exception e) {
			e.printStackTrace();

		} finally {
			// Release current connection to the connection pool
			// once you are done
			post.releaseConnection();
		}

		return response;
	}

	private void writeToFile(String s) {
		
		try {
			File f = new File("src/main/resources/xml/response.xml");
			f.createNewFile();
			// Create file
			FileWriter fstream = new FileWriter(f);
			BufferedWriter out = new BufferedWriter(fstream);
			out.write(s);
			// Close the output stream
			out.close();
		} catch (Exception e) {// Catch exception if any
			System.err.println("Error: " + e.getMessage());
		}
	}

}
